Reporting results – attributes

Reporting results - attributes

Once the optimization is complete, we can query the values of the attributes. In particular, we can query the VarName and X attributes to obtain the name and solution value for each variable:

  Console.WriteLine(x.Get(GRB.StringAttr.VarName) + " " + x.Get(GRB.DoubleAttr.X));
  Console.WriteLine(y.Get(GRB.StringAttr.VarName) + " " + y.Get(GRB.DoubleAttr.X));
  Console.WriteLine(z.Get(GRB.StringAttr.VarName) + " " + z.Get(GRB.DoubleAttr.X));

We can also query the ObjVal attribute on the model to obtain the objective value for the current solution:

  Console.WriteLine("Obj: " + model.Get(GRB.DoubleAttr.ObjVal));

The names and types of all model, variable, and constraint attributes can be found in the Attributes section of the Gurobi Reference Manual.